diff --git a/example/object/get.go b/example/object/get.go
index 8369f4f..e43a430 100644
--- a/example/object/get.go
+++ b/example/object/get.go
@@ -22,8 +22,6 @@ func main() {
 		Transport: &cos.AuthorizationTransport{
 			SecretID:  os.Getenv("COS_SECRETID"),
 			SecretKey: os.Getenv("COS_SECRETKEY"),
-			SecretID:  ak,
-			SecretKey: sk,
 			Transport: &debug.DebugRequestTransport{
 				RequestHeader:  true,
 				RequestBody:    true,